Crash in iOS 14.3 when using ForEachStore in TabView in tag 0.38.3

[ACFancy]

Crash in iOS 14.3 when using ForEachStore in TabView

• any idea for solved this crash problem ?

struct AState: Equatable, Identifiable {
  let uuid: UUID()
  var id: String { uuid.uuidString  }
}


struct BState: Equatable {
   var aStates: IdentifiedArrayOf<AState> = []
   @Bindable var selectedIndex: String = ""
   ...
}

enum  BAction: BindableAction {
    case aAction(String, AAction)
}

struct BView: View {
     let store: <BState, BAction>
     @ObservedObject private var viewStore: ViewStore<BState, BAction>
     ...
     var body: some View { 
            TabView(selectIndex: viewStore.binding(\.$selectedIndex)) {
                    ForEachState(store.scope(\.aStates, action: /BAction.aAction)) {
                      }
            }
      }
}

[mbrandonw]

Hi @ACFancy, there isn't enough info here for us to see why there might be a crash. Can you provide a sample project that reproduces the problem?

[ACFancy]

@mbrandonw SwiftUI TabView page style bug for iOS 14.xx, I using UIKit in SwiftUI to fixed that.

[erikbdev]

   var aStates: IdentifiedArrayOf<AState> = []

This most likely has nothing to do with Composable Architecture. Instead, this crash will most likely have to do with the aStates containing no elements by the time TabView draws, which TabView requires at least one element or else it crashes.

[ACFancy]

no elements above iOS 15.xx is ok, no crash, so, SwiftUI TabView page style bug in iOS 14.xxx

[ACFancy]

SwiftUI TabView page style bug for iOS 14.xx, I using UIKit in SwiftUI to fixed that.